Abstract: Oil-bearing fluid inclusions have been generally believed as samples of paleo oils reservoired in authigenic minerals.In this paper, the currently reservoired oils and oil-bearing fluid inclusions of 18 samples collected from sandstone oil reservoirs in Jungar Basin, Northwest China,were analyzed by GC and GC-MS.According to the results of analyses,alkane and aliphatic biomarker distributions,especially facies parameters are very similar between the above two type oils in samples A and B collected from the border areas,while distinctive in the other 16 samples collected from the central area of this basin.It indicated that both the paleo oils and the current oils in each of the two samples collected from the border areas were derived from the same source rocks,while in samples from the central area were derived from the varied source rocks.These results were consistent with the facts that in the areas of samples A and B,only one available source rock exists,while in the central area,at least three source rocks exist.

Key words: Jungar Basin, petroleum origins, oil components, oil-bearing fluid inclusions, reservoirs

摘要： 油气包裹体是保存在矿物中的古油气组分.对准噶尔盆地不同区域和不同石油地质背景的18个油气砂岩储集岩样品中现今油气组分和油气包裹体的饱和烃组分做了色谱和色-质谱分析.结果表明:采自盆地边缘两个样品,油气包裹体组分的地球化学特征,尤其是与油源、母质输入类型和沉积环境有关的地球化学参数,和现今油气组分基本相同,反映了古油气组分和现今油气组分都来自同一烃源岩;采自盆地腹部的16个储集岩样品,油气包裹体组分有关地球化学参数与现今油气组分有明显的差异,反映古油气组分与现今油气组分的油源不尽相同.这与盆地腹部存在多套烃源岩的地质背景相吻合.

关键词: 准噶尔盆地, 油源, 油气组分, 油气包裹体, 油气藏